Answer:
D. They dug drainage ditches. i think
Explanation:
Characteristics of the photic zone in the freshwater biome are the warmer water, light, rich in freshwater organisms, shallow.
The photic zone is the first zone from the top of the freshwater body of water. It is the shallowest part of the body of water, and it is further divided into the littoral zone and limnetic zone. This zone is the closest to the shore. The sunlight manages to penetrate in it, so it is a zone where the majority of the producers are able to survive and thrive because they can perform the process of photosynthesis. Since this zone enables the producers to thrive, and the producers are the basis of any ecosystem, it enables the further existence, high diversification, and thriving of all the other living organisms in the freshwater biome. The photic zone is also characterized with warmer water because it is on the top, it is heated by sunlight, so that provides nice conditions for the living organisms to be the most abundant in this zone.
Less than a percent (1.2%) of the earth's total water is Surface and aquifer freshwater sources hold.
Earth is 70% covered in water. Of this water, 97% is saline water which is found in the ocean and the rest is fresh water. Less than 1% of the earth's surface fresh water is in ground and surface water. And about 2% is available in the form of glaciers. Only 1% of aquifer water is usable in the form of rivers, lakes, or ponds. The atmosphere also holds some quantity of water in the form of tiny droplets.
In the US 49% of fresh water is used in electricity production by thermal electric power production,31% in agriculture irrigation,11% for public use, and the rest for industries as compared to developing countries where 70% is used in agriculture or industries.
Read about the distribution of water:
<u><em>brainly.com/question/187937</em></u>
The answer is B for that question
Answer:
Russia is the largest country in the world in land area.
The Ural Mountains lie mainly along the 60° East Longitude Line.
Explanation:
Russia is the largest country in the world in land area, and it is the biggest by far. The country stretches from the Baltic Sea in the west to the Pacific Ocean in the east, and from the Arctic Ocean in the north to the Caucasus and Central Asian steppes. The size of the country has created a lot of good conditions for development (a lot of natural resources) but also some problems (huge distances and inhospitable climate).
The Ural Mountains are a mountain chain in Russia. They are stretching in a roughly north-south direction from the Arctic coastline to the Caspian Sea coastline. This mountain range lies roughly on the 60° East Longitude Line. The Ural Mountains, in their peak, were among the highest mountains in the world, and they are also among the oldest mountains still in existence, but over the course of hundreds of millions of years the erosion has been leveling them and they are now ranging from low to medium height.
